Suspected memory leak

[gaowanlu]

I have the latest restbed version, without operating on the lambda body parameter, whenever you use http to upload large space in form-data, the memory occupied by the service application will grow, and it will only increase and will not go up and down

#include <string>
#include <sstream>
#include <iostream>
#include <vector>
#include "router/dynamic/image.h"
#include "entity/response.h"

using namespace colnago::router;
using namespace std;
using namespace colnago::entity;

/**
 * @brief POST /image
 *
 * @param session
 */
void image::POST(const std::shared_ptr<restbed::Session> session)
{
    const auto request = session->get_request();
    long long int content_length = stoll(request->get_header("Content-Length", "0"));
    string content_type = request->get_header("Content-Type");
    size_t i = content_type.find("multipart/form-data;");

    if (i == 0)
    {
        content_type.erase(i, strlen("multipart/form-data;"));
    }

    i = content_type.find_first_not_of(' '); 
    if (i != string::npos)
    {
        content_type.erase(0, i);
    }

    i = content_type.find_first_of("boundary=");
    if (i == 0)
    {
        content_type.erase(i, strlen("boundary="));
    }

    string slice_line = string("--") + content_type + "\r";
    string end_line = string("--") + content_type + "--\r";

    auto handler = [slice_line, end_line, content_type](const std::shared_ptr<restbed::Session> session, const restbed::Bytes &body) -> void
    {
        session->close(restbed::OK, "post success", {{"Content-Type", "text/text"}});
    };
    session->fetch(content_length, handler);
}

std::shared_ptr<restbed::Resource> image::resource()
{
    const char *postRestFul = "/image";
    auto resource = make_shared<restbed::Resource>();
    resource->set_path(postRestFul);
    resource->set_method_handler("POST", POST);
    return resource;
}

[gaowanlu]

This is my coding problem, or the reason for this library, which is a serious problem anyway